EP 0077542 A1 19830427 - Process for preparing diesters of malonic acid.
Title (en)
Process for preparing diesters of malonic acid.
Title (de)
Herstellungsverfahren von Malonsäurediestern.
Title (fr)
Procédé de préparation de diesters de l'acide malonique.
Publication
Application
Priority
JP 16348781 A 19811015
Abstract (en)
[origin: JPS5867647A] PURPOSE:To obtain the titled compound useful as a synthetic raw material for malonic acid, barbituric acid, medicines, agricultural chemicals, etc. industrially and advantageously, by reacting ketene with CO and a nitrous ester in the homogeneous liquid phase in an organic solvent in the presence of a complex catalyst having a specific composition. CONSTITUTION:Ketene is reacted with carbon monoxide and a nitrous ester in the homogeneous liquid phase in an organic solvent in the presence of a platinum group metallic complex of the formula L2MX2 (L is a ligand consisting of an organophosphorus compound or organic arsenic compound; M is a platinum group element ion; X is halogen or acetic acid ion), e.g. bistriphenylphosphine dichloropalladium, to give a malonic diester. Preferably, a compound containing a basic nitrogen, e.g. an amide or amine, and/or a halide of a metallic element, e.g. Ge or Sn, is present in the reaction system. EFFECT:Improved catalytic stability and yield. USE:A raw material for barbituric acid.
IPC 1-7
IPC 8 full level
B01J 31/00 (2006.01); C07B 61/00 (2006.01); C07C 67/46 (2006.01); C07C 69/38 (2006.01)
CPC (source: EP US)
C07C 67/46 (2013.01 - EP US)
Citation (search report)
[X] EP 0006611 A1 19800109 - UBE INDUSTRIES [JP]
Designated contracting state (EPC)
CH DE FR LI
DOCDB simple family (publication)
EP 0077542 A1 19830427; EP 0077542 B1 19850918; DE 3266416 D1 19851024; JP S5867647 A 19830422; JP S6212781 B2 19870320; US 4539423 A 19850903
DOCDB simple family (application)
EP 82109553 A 19821015; DE 3266416 T 19821015; JP 16348781 A 19811015; US 43304582 A 19821006